/*
 * PKGBUILD parsing routines.
 */

/*-
 * Copyright (c) 2008 Paulo Matias
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#ifndef PKGBUILDTOOLS_PARSER_HPP
#define PKGBUILDTOOLS_PARSER_HPP

#include <boost/variant.hpp>

#include <string>
#include <vector>
#include <map>

#include <tr1/unordered_map>

/* A shvar_t is a boost::variant that may contain a string or a vector
 * of strings, and represents the value of a shell variable.
 */
typedef std::string shvar_str_t;
typedef std::vector<std::string> shvar_vec_t;
typedef boost::variant<shvar_str_t, shvar_vec_t> shvar_t;

/* A shvar_info struct keeps information about a variable
 */
struct shvar_info {
    // begin and end iterators for the location where the variable is
    // assigned for the last time.
    std::string::iterator begin, end;
    shvar_t value; // the content of the variable.
    // constructor
    shvar_info(std::string::iterator begin_, std::string::iterator end_,
               shvar_t value_) :begin(begin_),end(end_),value(value_) {}
    // default constructor
    shvar_info() {}
};

/* A shvar_map is an unordened map of variable names and
 * shvar_info structs.
 */
typedef std::tr1::unordered_map<std::string, shvar_info> shvar_map;

#endif
